Hot Chips 2026: IBM's first dual-ISA core (www.tomshardware.com)

IBM has unveiled its next-gen AI processor, marking the first dual-ISA (Instruction Set Architecture) core that allows simultaneous execution of both z/Architecture and AArch64 instructions within the same core. Developed in collaboration with Arm, this innovative chip is designed to enhance software flexibility for mainframes, enabling businesses to bridge the deployment gap between Arm/x86 servers and IBM’s traditional mainframes. The core can dynamically switch between ISAs in mere nanoseconds, providing unprecedented support for applications typically written for the Arm ecosystem without requiring software modifications. This significant advancement could reshape the AI and ML landscapes, as it allows for the seamless integration of a broader range of software applications into mainframe environments, which have historically lagged behind in compatibility with modern development ecosystems. Built on a cutting-edge 2nm process, the processor features 11 high-performance cores with a base frequency of 5.7 GHz and substantial cache sizes. Additionally, IBM introduced a next-gen AI accelerator with enhanced memory capabilities, switching from LPDDR5 to HBM3e, significantly boosting bandwidth and performance for AI workloads. Collectively, these developments could unify deployment strategies across enterprise environments, offering a robust foundation for future AI-driven applications.